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<head>
    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //js用toJSON关键字可以自定义json数据
        let user={
            name:"唐玮",
            age:25,
            toJSON:function(){
                return {
                    name:this.name
                };
            }
        }
       let json =JSON.stringify(user);
       console.log(json);
    </script>
</body>
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